Coil-forming apparatus.



PATENTED NOV. '17, 1903.

No.744.6'71l E. L. AIKEN. GOIL FORMING APPARATUS.

APPLICATION FILED JAN. 17, 1903.

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PATENTED NOV. 17,1903.

A E. L. AIKEN.

COIL FORMING APPARATUS.

APPLICATION PIIQED JAN.17, 1! J03.

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INVENTOR Edward Lflihen byM baA;

WITNESSES.

NITED STATES I Patented November 1'7, 1903. PATENT OFF CE.

EDWARD L. .AIKEN, OF WARREN, PENNSYLVANIA, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

C-OlL-FORlI/HNG APPARATUS.

SPECIFICATION forming partof Letters Patent No. 744,671, dated November 17, 1903.

- riginal application filed December 5, 1898, $erial No. 698,243.

To all whom it may concern:

Be it known that I, EDWARD L. AIKEN, a citizen of the United States, residing at Warren, county of Warren, State of Pennsylvania, haveinvented certain new and usefulImprovements in Coil-Forming Apparatus, (being a division of my application, Serial No.

698,243, filed December 5, 1898,)of which the following is a specification.

My invention relates to apparatus for forming coils from ribbon or fiat metal strips, and has for its object to provide an inexpensive device for winding fiat strips of metal into coils without forging and without causing l5 them to. buckle or to assume positions other than at substantially right angles to the axis.

The invention will be more readily understood by reference to the accompanying drawings, forming a part of this specificatiom'in which Figure 1 represents an engine-lathe of ordinary construction with a coil in process of winding thereon. Fig. 2 is a side elevation, partly in section, of a part of the device shown 2 in Fig. 1, here drawn upon an enlarged scale. Fig. 3 is an end elevation, partly in section, of the par ts shown in Fig. 2, taken on the line 3 3. Fig. 4 is a plan, partly in section, of the arrangement shown in Figs. 2'and 3 for 0 confining the strip while it is being wound.

In Fig. 1, A is the bed of the lathe, boringmill, or other rotating mechanical structure. Of course any one of these devices may be used, as convenience may dictate, the essen- 5 tial feature being that it shall have sufficient power to'turn the mandrel against the tension of the conductor being wound. B is the usual slide-rest, which may be fed by hand, if desired, but is ordinarily pushed along the 0 slideways by the pressure of the work against the guide carried by the slide-rest. C is the mandrel, the construction of which will be best understood from Fig. 2. The other parts of the lathe are not referred to specifically by 5 letter, inasmuch as their construction is well known and readily apparent. E is the conductor or metal strip, which is to be wound from the reel E.

As shown in Fig. 2, C is a mandrel, which rotates between the centers X X by any suit- Divided and this application filed January l7 1903. Serial (No model.)

able means, such as the pins F F, connected with the face-plate of the lathe and the maudrel, respectively. As shown in Fig. 1, the face of the enlarged shoulder of the mandrel C is shaped as a helicoid. In the figure also is shown a slot C in the shoulder, into which the bent end E of the strip E is inserted to secure that end to the mandrel.

In Figs. 2 and 4, D is a non-rotatable ring secured to move with the slide-rest B, having a working fit with the mandrel C and adapted to slide longitudinally thereof, whereby said ring occupies positions successively farther removed from the shoulder of the mandrel C,

so that the increasing coil of the strip E on the mandrel Cis clamped between the'shoulder of the mandrel and-the ring D to assist in preventing buckling of the strip.

The ring D is secured to the slide-rest B in the following manner: As shown in Fig. 2, the base-block B is carried by the slide-rest, which block extends at a tangent to the surface of the mandrel C and forms a joint with the ring D, the ring being cut away fora portion of its width along-the line of a chordtangent to the inner circumference of the ring, thus forming a flat surface, which rests on the block 13". The entire width of the ring D is not, however, cut away .in .this manner, but only as far as the right-hand 8o edge of the block B ,.as shown by the inner dotted line in Fig. 4, thus leaving a depending are or lip D, Fig. 2, which extends along the side of thev block B.- The ring D is secured to the block B by bolts D Figs. 2and 4, which pass through the lip D into the part B Other bolts (not shown) may pass up through the block B and into the ring D at the lower flat cut-away surface thereof.

The ring D is formed with a helicoidal face 0 D opposing the similarly-shaped face of the shoulder of the mandrel C, and the strip E passes between these two surfaces and is wound on the mandrel. 1

The block 13 and the ringD are cut away, 5

as shown in Figs. 2 and 4, to provide a space for the block B, which is adjusted by means of a screw B passing through the lip D of the ring to force a rod or roller 1), which acts as an antifriction device, against the strip E, [0Q

which passes between the roller 1) and the guide B bolted to the block B. The stripcoil 'on the mandrel presses against the guide B and is securely held from buckling be tween the end of the wound coil and said guide B The rod or roller 1) or its equivalent is a very important feature of the ma chine, as without some such means it would be practically impossible to initially bend a strip so thin without buckling or crimping.

Referring to Figs. 3 and l, the operation may be described as follows: The strip E enters from the right between the ring D and the guide B and passes beneath the innermost projection of the helicoidal surface of the ring which overhangs the strip and the guide B as shown in Fig. 4E. The strip then passes in contact with the roller and is forced by the helicoidal surface of the ring to assume the form of a helix surrounding the mandrel O.

The slide-rest B, which carries the part B and the ring D, is free to slide parallel to the axis of the mandrel C under the pressure of the strip E as it is being coiled.

What I claim as new, and desire to secure by Letters Patent of the United States, ts-- 1. In a machine for Winding strips of metal on edge, the combination with a rotatable mandrel adapted to have the end of the strip attached to it, of a slide-rest adapted to move parallel with the axis of the mandrel, and means rigidly mounted on the slide-rest for guiding the strip and supporting it on both sides to prevent it from buckling as it is drawn on the mandrel.

2. In a machine for winding strips of metal on edge, the combination with a rotatable mandrel adapted to have the end of the strip attached to it, of a slide-rest adapted to move parallel with the axis of the mandrel, a ring surrounding the mandrel and secured to the slide-rest, a friction device at the point where the strip commences to bend, and a guide carried by the slide-rest to form a space between itself and the friction device.

3. In a machine for winding strips of metal on edge, the combination of a rotatable mandrel adapted to have theend of the strip attached to it, a slide-rest adapted to move parallel with the axis of the mandrel, a guide carried by the slide-rest against which guide bears the part of the coil which has been wound, a friction device carried by the sliderest at the point where the strip begins to bend, between which friction device and said guide the strip passes to the mandrel, whereby said strip in its passage to the mandrel is positively supported on both sides at the point at which it is bent.

4. In a machine for winding strips of metal on edge, the combination with a rotatable mandrel having a shoulder which is formed with a helicoidal surface, of a slide-rest adapted to move parallel to the axis of the mandrel, and a ring having a helicoidal surface mounted about said mandrel, secured to said slide-rest and adapted to normally hold the portion of the coil which has been wound on the mandrel between itself and the shoulder of the mandrel, and to be forced along by the increasing coil with the slide-rest to which it is secured.

5. In a machine for winding strips of metal on edge, the combination with a mandrel havinga shoulder which is formed with a helicoidal surface, of a slide-rest adapted to move parallel with the axis of the mandrel, a ring having a hclicoidal surface mounted about said mandrel and secured to said slide-rest to form a space between the ring and slide-rest, a friction device in said space, and a guide on the slide-rest adapted to cooperate with the friction device.

6. Inamachineforwindingstripsofametal on edge, the combination with a rotatable mandrel, of a slide-rest movable longitudinally thereof, and a ring mounted about the mandrel and having a flat ortion resting on the sliderest, to which it is secured.

7. In a machine for winding strips of metal on edge, the combination with a rotatable mandrel, of a sliderest movable longitudinally thereof, and a ring mounted about the mandrel and havinga depending lip through which it is secured to the slide-rest.

8. In a machine for winding strips of metal on edge, the combination with a rotatable mandrel, of a slide-rest movable longitudinally thereof, a guide and friction device carried by said slide-rest, and anon-rotatable ring mounted about the mandrel and formed with a helicoidal surface, a portion of which projects over the space between the guide and ring.

In witness whereof I have hereunto set my hand this 12th day of January, 1903.

EDWARD L. AIKEN.

Witnesses:

J. G. SMITH, M. M. MILLER. 

